undefeated
Britishadjective
Explanation
Has your volleyball team won every single game this season? Then it's undefeated — it hasn't been beaten yet! You'll almost always find this adjective describing sports teams or players who haven't suffered a loss, like the undefeated tennis player who's won all of her matches or the basketball team that's been undefeated for four games. Undefeated adds the prefix un-, or "not," to defeated, "beaten," which we can trace back to the Vulgar Latin diffacere, "destroy."
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The Chargers will have their two top wide receivers back Sunday as they seek their first win of the season against the undefeated Kansas City Chiefs.
From Los Angeles Times ● Oct. 17, 2026
On Sunday the Patriots came from behind late in the fourth quarter to beat their previously undefeated divisional heavy Buffalo, 29-26.
From The Wall Street Journal ● Oct. 7, 2026
Trailing by three points with four seconds remaining, Aurich’s team pulled off a 44-yard Hail Mary, complete with a precisely designed lateral, to win 20-17 and remain undefeated.
From The Wall Street Journal ● Oct. 6, 2026
Winning the Trinity League opener at Saddleback College kept the Eagles undefeated at 6-0.
From Los Angeles Times ● Oct. 3, 2026
“E’lir Fenton, since Kvothe is undefeated you will have the choice of source.”
From "The Name of the Wind" by Patrick Rothfuss
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